Abstract
Using beneficial organisms, insect predators should help to decline the population density of pest organisms (insects or mites). Understanding the natural enemy capability to manage different insect pests may lead to sager insect control, comprising pesticide reduction and keeping the environment clean. The abundance of predators could help controlling and reducing the pest populations and thus preventing insect pest outbreaks. Interactions between multiple predator species should modify the strength of prey suppression. These interactions had been distinguished by different predation levels. There are various mechanisms may provide the greatest benefit for biocontrol agents. A suggested strategy for more efficient conservation biological control is containing collection natural enemies, preservation them and releasing the preserved biocontrol agents on target crops. Some of predators have a restricted tolerance to the prey feeding and abiotic factors; therefore, mass rearing and field application of insect predators are considered one of the main aspects in succeeding the biological control programs. In a case study, efficacy of insect predators against some aphid species in different crops was shown that insect predators played a significant role in controlling these aphid species. We tried to present the status and potential of insect predators throughout researching the abundance, the mass production and the field application of them.